Manusmriti
गुरुपत्नी तु युवतिर्नाभिवाद्यैह पादयोः । पूर्णविंशतिवर्षेण गुणदोषौ विजानता ॥ २१२ ॥
(A pupil) who is full twenty years old, and knows what is becoming and unbecoming, shall not salute a young wife of his teacher (by clasping) her feet.
english translation
gurupatnI tu yuvatirnAbhivAdyaiha pAdayoH । pUrNaviMzativarSeNa guNadoSau vijAnatA ॥ 212 ॥
hk transliteration by Sanscript